<template>
  <div>
    <!-- 面包蟹导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮区域 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="dialogVisible = true"
            >添加角色</el-button
          >
        </el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table :data="rolelist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row  :class="['bdbottom',i1===0?'bdtop':'','vcenter']" v-for="(item1,i1) in scope.row.children"
            :key="item1.id">
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close='removeRightById(scope.row,item1.id)'>
                   {{item1.authName}}
                </el-tag>
                <i class="el-icon-caret-right"></i>
               
              </el-col>
              <!-- 渲染二级权限 --> <!-- 渲染三级权限 -->

              <el-col  :span="19">
                <!-- 通过for循环嵌套渲染二级权限 -->
                <el-row :class="[i2 ===0?'':'bdtop','vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id"> 
                  <el-col :span="6">
                   <el-tag type="success" closable @close='removeRightById(scope.row,item2.id)'>{{item2.authName}}</el-tag>
                   <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                     <el-tag type="warning" v-for="(item3) in item2.children" 
                     :key='item3.id' closable @close='removeRightById(scope.row,item3.id)'>
                       {{item3.authName}}
                     </el-tag>
                  </el-col>
                </el-row>
              </el-col>
             

            </el-row>
           <!-- <pre>
             {{scope.row}}
           </pre> -->
            
          </template>
        </el-table-column>

        <!-- 索引列 -->
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" 
            icon="el-icon-edit"
            @click="showEditDialog(scope.row.id)"
              >编辑</el-button
            >
            <el-button
              size="mini"
              type="danger"
              icon="el-icon-delete"
              @click="removeRolesById(scope.row.id)"
              >删除</el-button
            >
            <el-button size="mini" type="warning" icon="el-icon-setting"
            @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 添加用户的对话框 -->
    <el-dialog
      title="提示"
      :visible.sync="dialogVisible"
      width="38%"
      @close="addDialogClosed"
    >
      <el-form
        :model="addFrom"
        :rules="addFromRules"
        ref="addFormRef"
        label-width="100px"
      >
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addFrom.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addFrom.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="dialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addUser">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 修改用户的对话框 -->
    <el-dialog title="修改用户" :visible.sync="editDialogVisible"
     width="50%" @close='editDialogClose'>
      <!-- 内容区域 -->
      <el-form
        :model="editForm"
        :rules="editFormRules"
        ref="editFormRef"
        label-width="100px"
        
      >
        <el-form-item label="角色名称" prop="roleName" >
          <el-input v-model="editForm.roleName" ></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>

      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" 
        @click="editUserInfo"
          >确 定</el-button
        >
      </span>
    </el-dialog>
    <!-- 分配权限的对话框 -->
    <el-dialog
  title="分配权限"
  :visible.sync="setRightDialogVisible"
  width="50%" @close="setRightDialogClosed">
  <!-- 权限树 -->
  <el-tree :data="rightList" :props="treeProps" 
  show-checkbox  default-expand-all node-key="id"
  ref = "treeRef"
  :default-checked-keys="defKeys"></el-tree>

  <span slot="footer" class="dialog-footer">
    <el-button @click="dialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      rolelist: [],
      dialogVisible: false,
      //   添加的数据
      addFrom: {
        roleName: "",
        roleDesc: "",
      },
      //   添加的规则
      addFromRules: {
        roleName: [
          { required: true, message: "请输入角色名称", trigger: "blur" },
          {
            
            max: 10,
            message: "长度不得超过10 个字符",
            trigger: "blur",
          },
        ],
        roleDesc: [
          { required: true, message: "请输入角色描述", trigger: "blur" },
        ],
      },
      // 控制修改用户的对话框的显示与隐藏
      editDialogVisible: false,
      //查询到的用户信息对象
      editForm: {},
      // 修改表单的验证规则
      editFormRules:{
          roleName: [
          { required: true, message: "请输入角色名称", trigger: "blur" },
          {
            min: 3,
            max: 10,
            message: "长度在 3 到 10 个字符",
            trigger: "blur",
          },
        ],
        roleDesc: [
          { required: true, message: "请输入角色描述", trigger: "blur" },
        ],
      },
      // 控制分配权限的对话框
      setRightDialogVisible:false,
      rightList:[],
      treeProps:{
        label:'authName',
        children:'children'
      },
      defKeys:[],
      // 提交分配权限的id
      roleId:''
    };
    
  },
  created() {
    this.getRolesList();
  },
  methods: {
    //   获取所有角色的列表
    async getRolesList() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status !== 200) {
        return this.$message.error("获取角色列表失败");
      }
      this.rolelist = res.data;
      console.log(this.rolelist);
    },

    // 监听用户对话框关闭事件
    // ref 操作dom元素     2.resetFields()就是清除
    addDialogClosed() {
      this.$refs.addFormRef.resetFields();
    },
    //   添加用户
    addUser() {
      this.$refs.addFormRef.validate(async (valid) => {
        if (!valid) return;
        const { data: res } = await this.$http.post("roles", this.addFrom);
        if (res.meta.status !== 201) {
          return this.$message.error("添加角色失败");
        }
        this.$message.success("添加成功");
        this.dialogVisible = false;
        this.getRolesList();
      });
    },
    // 删除角色
    async removeRolesById(id) {
      // 弹框询问用户是否删除数据
      const confirmResult = await this.$confirm(
        "永久删除该用户, 是否继续?",
        "提示",
        {
          confirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);
      if (confirmResult !== "confirm") {
        return this.$message.info("已取消删除");
      }
      const { data: res } = await this.$http.delete("roles/"+id);
      console.log(res)
      if (res.meta.status !== 200) {
        return this.$message.error("删除失败");
      }
      this.$message.success("删除成功");
      this.getRolesList();
    },
        //展示编辑用户的对话框
    async showEditDialog(id){
         const { data: res } = await this.$http.get("roles/" + id);
      if (res.meta.status !== 200) {
        return this.$message.error("查询用户信息失败");
      }
      this.editForm = res.data;
        this.editDialogVisible = true

    },
     // 监听修改对话框的关闭
    editDialogClose(){
        this.$refs.editFormRef.resetFields()
    },
      // 修改用户信息并且提交
    editUserInfo(){
      this.$refs.editFormRef.validate( async (valid)=>{
        if (!valid) return
        const {data:res} = await this.$http.put('roles/'+ this.editForm.roleId,{
          roleName:this.editForm.roleName,
          roleDesc:this.editForm.roleDesc
        })
        console.log(this.editForm.roleId)
        console.log(res)
         if (res.meta.status !== 200) {
          this.$message.error("更新角色失败");
        }
        //  隐藏添加用户的对话框
        this.editDialogVisible = false;
        //  重新获取用户列表，刷新列表用户
        this.getRolesList();
        this.$message.success("修改成功");
      })
    },
   async removeRightById(role,rightId){
      const confirmResult=  await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err =>err)
        if(confirmResult!=='confirm'){
          return this.$message.info('取消了删除')
        }
      const {data:res} =  await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      // console.log(rightId,role)
      if(res.meta.status!==200){
        return this.$message.error('删除权限失败')
      }
      // this.getRolesList()
      role.children = res.data
    },
    // 展示分配权限的对话框,role是和getLeafKeys有关
    async showSetRightDialog(role){
      // console.log(role)
      this.roleId = role.id
      // 获取所有权限的数据
     const {data:res} = await this.$http.get('rights/tree')
     if(res.meta.status!==200){
       return this.$message.error('获取列表数据失败')
     }
    //  获取到的权限数据保存到data中
      this.rightList = res.data
      // console.log(this.rightList)
      //递归获取三级节点的ID
      this.getLeafKeys(role,this.defKeys)
      this.setRightDialogVisible = true
    },
    // 通过递归的方式,获取角色下所有三级权限的id，并保存到defKeys数据中
    getLeafKeys(node,arr){
      // 如果当前的节点不包含children属性，则是三级节点
      if(!node.children){
        return arr.push(node.id)
      }
      node.children.forEach(item => 
      this.getLeafKeys(item,arr));
      
    },
    // 监听分配对话框的关闭事件
    setRightDialogClosed(){
      this.defKeys = []
    },
   async allotRights(){
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]

    const idStr = keys.join(',')
     const {data:res} =  await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
      if(res.meta.status!==200){
       return this.$message.error('分配角色失败')
     }
      this.$message.success('分配角色成功')
      this.getRolesList()
      this.setRightDialogVisible = false
    },
  },
};
</script>
<style scoped>
.el-tag{
  margin: 7px;
  
}
.bdtop{
border-top: 1px solid #eee;
}
.bdbottom{
  border-bottom: 1px solid #eee;

}
.vcenter{
  display: flex;
  align-items: center;
}
</style>